Classes | Very low | Low | Middle | Strong | Very strong |
Thicknesses of saprolite | <10 m | 10 - 15 m | 15 - 25 m | 25 - 40 m | 40 - 70 m |
Number (n = 117) | 5 | 16 | 45 | 40 | 11 |
Percentage | 4.27 | 13.68 | 38.46 | 34.19 | 9.40 |